固态固态气态气态升华升华凝华凝华升华吸热，凝华放热升华吸热，凝华放热在严寒的冬天,一直冰冻着的衣也会变干放在衣厨中的樟脑丸越来越小寒冷的冬天,在窗玻璃上会有冰花电灯泡用得时间长了,电灯泡上会发黑生活中的应用生活中的应用在深秋初冬早上的地面常会出现霜在深秋初冬早上的地面常会出现霜, ,人们常说人们常说道道: :“下霜了下霜了! !”你是如何评价这种说法的你是如何评价这种说法的干冰升华干冰升华人工降雨常用的物质是什么人工降雨常用的物质是什么? ?其原理是什么其原理是什么? ?人工降雨的全过程经历了哪些物态变化人工降雨的全过程经历了哪些物态变化? ?干冰升华 水蒸气凝华 小冰晶熔化雾凇雾凇物态变化物态变化下列说法正确的是下列说法正确的是A 云是由水蒸气升入高空时遇冷凝结成的小水珠和云是由水蒸气升入高空时遇冷凝结成的小水珠和 大量小冰晶组成大量小冰晶组成B 雾是飘浮在空气中的大量的水蒸气雾是飘浮在空气中的大量的水蒸气C 露是大量小冰晶吸热熔化形成的小水珠露是大量小冰晶吸热熔化形成的小水珠 D 霜是空气中的水蒸气凝华而成的大量的小冰晶霜是空气中的水蒸气凝华而成的大量的小冰晶只吸热不升温的物态变化是只吸热不升温的物态变化是测量测量200摄氏度高温物体和摄氏度高温物体和 50摄氏度的物体应分别采用摄氏度的物体应分别采用什么温度计？（水银温度计，酒精温度计）什么温度计？（水银温度计，酒精温度计）填出下列物质吸热时温度的变化情况填出下列物质吸热时温度的变化情况(1) 20 摄氏度的冰吸热，温度将摄氏度的冰吸热，温度将（2）0摄氏度的水吸热，温度将摄氏度的水吸热，温度将（3）0 摄氏度的冰水混合物吸热，温度将摄氏度的冰水混合物吸热，温度将海波的熔点是海波的熔点是48摄氏度，所以摄氏度，所以48摄氏度的海波摄氏度的海波A 一定是固态一定是固态C 一定是固液共存一定是固液共存B 一定是液态一定是液态D 以上三种均有可能以上三种均有可能将一块将一块-2-2摄氏度的冰放在摄氏度的冰放在3 3摄氏度的水中，过一会还剩下小块摄氏度的水中，过一会还剩下小块冰留在水中，则这时水的温度是冰留在水中，则这时水的温度是 冰的温度是冰的温度是戴眼镜的人和开水时镜片上会蒙上一层白雾，为什么？戴眼镜的人和开水时镜片上会蒙上一层白雾，为什么？从嘴里呵气到手背上会感到热，而从口中吹出的气到手背从嘴里呵气到手背上会感到热，而从口中吹出的气到手背上却感到凉，为什么？上却感到凉，为什么？1 1 归纳物态变化表归纳物态变化表2 2 各种物态变化（共各种物态变化（共6 6种）分别举例种）分别举例2 2到到3 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